// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef BASE_ANDROID_BUILD_INFO_H_
#define BASE_ANDROID_BUILD_INFO_H_

#include <jni.h>

#include <string>

#include "base/base_export.h"
#include "base/macros.h"
#include "base/memory/singleton.h"

namespace base {
namespace android {

    // This enumeration maps to the values returned by BuildInfo::sdk_int(),
    // indicating the Android release associated with a given SDK version.
    enum SdkVersion {
        SDK_VERSION_JELLY_BEAN = 16,
        SDK_VERSION_JELLY_BEAN_MR1 = 17,
        SDK_VERSION_JELLY_BEAN_MR2 = 18,
        SDK_VERSION_KITKAT = 19,
        SDK_VERSION_KITKAT_WEAR = 20,
        SDK_VERSION_LOLLIPOP = 21,
        SDK_VERSION_LOLLIPOP_MR1 = 22,
        SDK_VERSION_MARSHMALLOW = 23
    };

    // BuildInfo is a singleton class that stores android build and device
    // information. It will be called from Android specific code and gets used
    // primarily in crash reporting.

    // It is also used to store the last java exception seen during JNI.
    // TODO(nileshagrawal): Find a better place to store this info.
    class BASE_EXPORT BuildInfo {
    public:
        ~BuildInfo() { }

        // Static factory method for getting the singleton BuildInfo instance.
        // Note that ownership is not conferred on the caller and the BuildInfo in
        // question isn't actually freed until shutdown. This is ok because there
        // should only be one instance of BuildInfo ever created.
        static BuildInfo* GetInstance();

        // Const char* is used instead of std::strings because these values must be
        // available even if the process is in a crash state. Sadly
        // std::string.c_str() doesn't guarantee that memory won't be allocated when
        // it is called.
        const char* device() const
        {
            return device_;
        }

        const char* manufacturer() const
        {
            return manufacturer_;
        }

        const char* model() const
        {
            return model_;
        }

        const char* brand() const
        {
            return brand_;
        }

        const char* android_build_id() const
        {
            return android_build_id_;
        }

        const char* android_build_fp() const
        {
            return android_build_fp_;
        }

        const char* gms_version_code() const
        {
            return gms_version_code_;
        }

        const char* package_version_code() const
        {
            return package_version_code_;
        }

        const char* package_version_name() const
        {
            return package_version_name_;
        }

        const char* package_label() const
        {
            return package_label_;
        }

        const char* package_name() const
        {
            return package_name_;
        }

        const char* build_type() const
        {
            return build_type_;
        }

        int sdk_int() const
        {
            return sdk_int_;
        }

        const char* java_exception_info() const
        {
            return java_exception_info_;
        }

        void SetJavaExceptionInfo(const std::string& info);

        void ClearJavaExceptionInfo();

        static bool RegisterBindings(JNIEnv* env);

    private:
        friend struct BuildInfoSingletonTraits;

        explicit BuildInfo(JNIEnv* env);

        // Const char* is used instead of std::strings because these values must be
        // available even if the process is in a crash state. Sadly
        // std::string.c_str() doesn't guarantee that memory won't be allocated when
        // it is called.
        const char* const device_;
        const char* const manufacturer_;
        const char* const model_;
        const char* const brand_;
        const char* const android_build_id_;
        const char* const android_build_fp_;
        const char* const gms_version_code_;
        const char* const package_version_code_;
        const char* const package_version_name_;
        const char* const package_label_;
        const char* const package_name_;
        const char* const build_type_;
        const int sdk_int_;
        // This is set via set_java_exception_info, not at constructor time.
        const char* java_exception_info_;

        DISALLOW_COPY_AND_ASSIGN(BuildInfo);
    };

} // namespace android
} // namespace base

#endif // BASE_ANDROID_BUILD_INFO_H_
